Transport Canada Center

Centre de Transports Canada

Scurit Maritime901, Cap DiamantQubec (Qubec)

WINTER NAVIGATION INFORMATION

SEA WATER COOLING TYPES

To Master M/V:

OTTAWA EXPRESS

Date: 2007-12-21

IMO No: 9165360

The Gulf of St-Lawrence and the St-Lawrence River provide unique conditions fornavigation during winter months.In order to provide you with the best services and a safe transit, we need specificinformation concerning the type of sea water cooling system installed on board yourvessel. It is very important that you refer to the ships drawing in order to give us themost exact information.The drawings attached are described from type 1 to type 6. It also includes a blank forwhich you can draw your ships type if your vessel does not correspond to those alreadydrawn.The drawings are related to the sea water cooling of the main engine and generators.Could you check off the boxes numbered 1 to 36 that relates to your cooling system andreturn the information by e-mail or fax.If you decide to reply by fax, you should print the sheet title Type of sea water coolingsystem, check off the boxes and return it to the following fax : 1-418-648-5106If your choice is to reply by e-mail, you send the number of the boxes you checked off.Ex: For a vessel that has recirculation of water to the pump with an automatic tempcontrol and equipped with a connection to the sea chest for steam and compressed air,your answer by e-mail would then be: 3, 4, 5, 26, 27.If you have any questions, you can contact us via CCG Radio station, by e-mail or by fax.

Fax : 1-418-648-5106

E-mail : gestdev@tc.gc.ca

Name of vessel:________________________IMO No:_____________________

TYPE OF SEA WATER COOLING SYSTEMType 2S/W Recirculate before pumpMain engine or Generators

Main engine or Generators

1 ) M/E

Overboarddisch. valveo

Overboarddisch. valveS

Type 1 2 ) Gen.S/W direct overboard

cooler

3 ) M/E4 ) Gen.s/w temp5 ) Auto control6 ) Man. control

os

Type 3S/W Recirculate before strainer

Main engine or Generators

7 ) M/E8 ) Gen.S/W temp9 ) Auto control10 ) Man. control

Type 4S/W Recirculate to sea chest

Main engine or Generators

Overboarddisch. valveS

Overboarddisch. valve

11 ) M/E12 ) Gen.S/W temp13 ) Auto control14 ) Man. control

So

Type 5S/W Recirculate to sea chest and/or sea bay

Main engine or Generators

Type 6Box or Keel cooler19 ) M/E20 ) Gen.

15 ) M/E16 ) Gen.S/W temp17 ) Auto control18 ) Man. control

Overboarddisch. valveo

os

SEABAY

Cooling system options

25 )Central cooling low tempsystem.

26 )Steam to sea chest..27 )Compressed air to sea chest..28 )Thermal oil coil in sea chest..29 )High suction30 )Low suction.31 )Stern suction...32 )Baltic type (weir) sea chest33 )Use of ballast water for main engine34 )Use of ballast water for generators..35 )Recirculation water to ballast tank for main engine..36 )Recirculation water to ballast tank for generators.